When I was a teenager , we actually had this probelm, and your right there are teeny tiny little black particles that are everywhere, you really dont notice them until someone points them out. 40 years ago we were not aware of the poisoning. However those little black balls do have like a oil in them and can kill you. I Hope that is not her problem or if it is she finds this and calls a repair man and opens up her windows asap! Im not sure that she would be itchy tho!
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